State Department Press Secretary Ned Price is seen speaking during a daily press briefing at the department in Washington on Jan. 4 in this captured image. Yonhap

The United States is concerned about North Korea's disregard of a tension-reduction agreement it signed with South Korea in 2018, a state department official said Wednesday.

"We are concerned about the DPRK's apparent disregard of the 2018 comprehensive military agreement, and we call on it to end its irresponsible and escalatory behavior," department press secretary Ned Price said during a daily press briefing.

DPRK stands for the Democratic People's Republic of Korea, the North's official name.

South Korean President Yoon Suk Yeol ordered his aides to consider suspending the inter-Korean agreement on Wednesday (Seoul time), after North Korea sent five spy drones across the heavily-fortified inter-Korean border last week in what Seoul has called a clear violation of the 2018 agreement.